Improvement in step-ladders



S. C. BLAUVELT.

STEP-LADDER.

Patented March 21, 1876.

MPETERS. PNQTDUTHOGHAPHER. WASHINGTON, u G

UNITED STATES PATENT OFFICE.

SILAS O. BLAU'VELT, OF BLAUVELTVTLLE, NEW YORK.

IMPROVEMENT IN STEP-LADDERS.

Specification forming part of Letters Patent No. 175,0] 6, dated March21, 1876; application filed February 28, 1876.

To all whom it may concern:

Be it known that I SILAS O. BLAUVELT, of Blauveltville, Rockland county,New York, have invented a new and Improved Step-Ladder, of which thefollowing is a specification Figure l is a vertical section of myimproved step-ladder arranged for use, and showing in dotted lines itsposition when arranged as a ladder; and Fig. 2 is a side view of thesame folded for storage or transportation.

Similar letters of referenee'indicate correspondin g parts.

The object of this invention is to furnish an improved step-ladder whichshall be so constructed that it may be readily arranged for use as astep-ladder or as an ordinary ladder, and may be folded together forstorage and transportation, and, when adjusted for either purpose, willbe held securely in place, and

' which shall be simple in construction and confront part A are attachedblocks or plates 0, the rear ends of which are rounded oif or madesemicircular, and are pivoted to the upper ends of the side bars of therear part B by pivots D, which pass through holes in the plates orblocks 0, and through short slots b in the side bars of the part B.

To the side bars of the part B, in line with the slot 12 and at such adistance below it as to move along the curved edge of the block or plate0 when the pivot D is in the upper end of said slot 1;, is attached apin, b

In the curved edge of the blocks or plates 0 are formed threenotches,G,in such position as to receive the pin 12 and lock the parts AB together when arranged for use as a stepladder and as a ladder, andwhen folded, as shown in Figs. 1 and 2.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The blocks or plates 0, provided with thesemicircular rear ends and the notches G, the pin b and the slot b, whenused in connection with the pivot D and the parts A B of a stepladder,substantially as herein shown and described.

SILAS CALVIN BLAUVELT.

Witnesses:

J. C. BLAUVELT, A. T. BLAUV'ELT.

